The answer i wanna know the answer so i can figure out why that's the answer

How do i solve uniform motion problems?

With alll of except for the 2 that i did already

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)